Commit 49045d3d authored by Clemens Ladisch's avatar Clemens Ladisch Committed by Jaroslav Kysela
Browse files

[ALSA] usb-audio: add SNDRV_PCM_INFO_BATCH flag 



USB generic driver
Add the SNDRV_PCM_INFO_BATCH flag to the PCM hardware information to
indicate that the driver uses double buffering.

Signed-off-by: default avatarClemens Ladisch <clemens@ladisch.de>
parent 025cd2f6

sound/usb/usbaudio.c

+10 −6
Original line number Diff line number Diff line
@@ -1439,9 +1439,11 @@ static int snd_usb_pcm_prepare(snd_pcm_substream_t *substream) 


static snd_pcm_hardware_t snd_usb_playback =

{

	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |

				 SNDRV_PCM_INFO_BLOCK_TRANSFER |

				 SNDRV_PCM_INFO_MMAP_VALID),

	.info =			SNDRV_PCM_INFO_MMAP |

				SNDRV_PCM_INFO_MMAP_VALID |

				SNDRV_PCM_INFO_BATCH |

				SNDRV_PCM_INFO_INTERLEAVED |

				SNDRV_PCM_INFO_BLOCK_TRANSFER,

	.buffer_bytes_max =	(256*1024),

	.period_bytes_min =	64,

	.period_bytes_max =	(128*1024),
@@ -1451,9 +1453,11 @@ static snd_pcm_hardware_t snd_usb_playback = 


static snd_pcm_hardware_t snd_usb_capture =

{

	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |

				 SNDRV_PCM_INFO_BLOCK_TRANSFER |

				 SNDRV_PCM_INFO_MMAP_VALID),

	.info =			SNDRV_PCM_INFO_MMAP |

				SNDRV_PCM_INFO_MMAP_VALID |

				SNDRV_PCM_INFO_BATCH |

				SNDRV_PCM_INFO_INTERLEAVED |

				SNDRV_PCM_INFO_BLOCK_TRANSFER,

	.buffer_bytes_max =	(256*1024),

	.period_bytes_min =	64,

	.period_bytes_max =	(128*1024),